org.n52.wps.ags.spatialanalyst.groundwater.darcyvelocity DarcyVelocity_sa Calculates the groundwater seepage velocity vector (direction and magnitude) for steady flow in an aquifer. Uses ArcObjects library - Spatial Analyst in_head_raster in head raster The input raster where each cell value represents the groundwater head elevation at that location. The head is typically an elevation above some datum, such as mean sea level. application/img application/GeoTIFF application/img in_porosity_raster in porosity raster The input raster where each cell value represents the effective formation porosity at that location. application/img application/GeoTIFF application/img in_thickness_raster in thickness raster The input raster where each cell value represents the saturated thickness at that location. The value for the thickness is interpreted from geological properties of the aquifer. application/img application/GeoTIFF application/img in_transmissivity_raster in transmissivity raster The input raster where each cell value represents the formation transmissivity at that location. The transmissivity of an aquifer is defined as the hydraulic conductivity K times the saturated aquifer thickness b, as units of length squared over time. This property is generally estimated from field experimental data, such as pumping tests. Tables 1 and 2 in How Darcy Flow and Darcy Velocity work list ranges of hydraulic conductivities for some generalized geologic materials. application/img application/GeoTIFF application/img

out_direction_raster out direction raster The output raster where each cell value represents the direction of the seepage velocity vector (average linear velocity) at the center of the cell, calculated as the average value of the seepage velocity through the four faces of the cell. It is used with the out_magnitude_raster to describe the flow vector. application/img application/GeoTIFF application/img

out_magnitude_raster out magnitude raster The output raster where each cell value represents the magnitude of the seepage velocity vector (average linear velocity) at the center of the cell, calculated as the average value of the seepage velocity through the four faces of the cell. It is used with the out_direction_raster to describe the flow vector. application/img application/GeoTIFF application/img